Method of and apparatus for treating metal sheets



H. W. LAMB. METHOD OF AND APPARATUS FOR TREATING METAL S HEETS. APPLICATION FILED APR. 15, 19 T 1,337,458. Patented p 20,1920.

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H. W. LAMB.

METHOD OF AND APPARATUS FOR TREATING METAL SHEETS.

APPLICATION FILED APR. 15, I919.

Patented Apr. 20, 1920.

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H. W. LAMB.

METHOD OF AND APPARATUS FOR TREATING METAL SHEETS. APPLICATION FILED APR. 15. 1919.

1,337,458. Patented Apr. 20, 1920.

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EveuZv 7" zmW/ HENRY Vi. LAT/LB, Q35 BROOKLIYDTE, MASSACHUSETTS.

METE'OD OF AND 1,33"X,4l5$, Specification of Application filed April 1-5,

To all whom it may concern:

it known that I, HENRY W. LAMB, a citizen of the United States, residing in Brookline, in the county of Norfolk and State of Massachusetts, have invented an improvement in lllethods of and Apparatus for Treating Metal Sheets, of which the following description, in c nnection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a novel method and apparatus for treating metal sheets and particularly metal sheets of relatively large dimensions and such as are produced in rolling mills, whereby the metal sheets may be provic ed with accurate dimensions in a minimum time and at a minimum expense.

To this end, the metal sheet'is fed through an apparatus provided with longitudinal edge-forming cutters which are separated by a space equal to thewidth of the finished sheet, and said sheet is fed by suitable feed rolls in the direction of its length to the said cutters so that the latter simultaneously out the metal sheet to form parallel side edges, and the sheet thus cut is fed in the same direction preferably by a plurality of pairs of rolls a predetermined distance and onto the bed or table of a member having two sets of cutters arranged transversely with relation to the path of movement of the metal sheet and further arranged so as to be separated from each other by a space equal to the length of the finished sheet, and to be operated while the metal 'sheet is stationary so that the latter is simultaneously out near its opposite ends to form the end edges of the finished sheet, the operation of the transverse cutters being controlled by the metal sheet whose forward end engages a stop device, which controls the power employed to operate the end cutters. After the sheet has been cut as described it may be automatically removed from the table of the member having the two sets of end edgeforming cutters. These and other featuresof this invention will be pointed out in the claims at the end of this specification.

Figure 1 is a side elevation of one construction of apparatus with which metal sheets may be treated according to this invention. v

Fig. 2, a detail of the stop device and. parts controlled by it.

Letters Patent.

:US ESE TREATING METAL SHEETS.

Patented Apr. 20, 1920.

1919. Serial no. 290,249.

Fig. 2 a section on the line Fig. 3 tp show the clutch shown also in Fig. 2, big. 2" a section of'Fig. 2 on line 2 Fig. 3, a plan of the apparatus shown in Fig.1. 1

Fig. i, a detail to be referred to.

Fig. 5, a longitudinal section on the line 55, Fig. 3, and

Fig. 6, a detail of the table or bed of the member provided with the transverse cutters.

ldeferrin to the drawing 10;12, represent a pair of feed rolls by means of which a metal sheet is fed to two sets 13, 14 of cutters, by which the sheet is simultaneously cut longitudinally to form parallel side edges. Each set 13, 14L of the side edge cutters preferably comprises two rotatable disk like cutters fast on shafts 15, 16, which latter are positively driven in any suitable manner, and with which cooperate delivery rolls 1?, 18 which receive the cut metal sheet and feed it forward. The parts thus far described may and preferably will be of the construction shown and described in Patent No. 1,160,833 dated Nov. 16, 1915, to which reference may be had for a more detailed description of the construction and operation of the same. The surplus metal strips out from the sheet by the rotary side cutter are deflected down between the rotary cutters and the delivery rolls by suitable .iingers or depressing devices 19, only one of which is shown in Fig. l.

The metal sheet is fed by the delivery rolls 17, 18 and preferably by an additional pair of feed rolls 190, 191'into position to be simultaneously out transversely near its opposite ends, to provide the metal sheet with end edges, which may and preferably will be at right angles to the side edges.

in the present instance I have illustrated one construction or arrangement for simultaneously providing the sheet with end edges.

To this end two sets 20, 21 of transverse cutters, see Fig. 5, are located at the proper distance apart according to the length of the finished metal sheet, and each set of transverse cutters comprises a stationary lower knife or cutter 22, and a movable upper knife or cuter23, the latter being shown as reciprocated by an eccentric 24 whose rod 25 is connected with the carrier 26 for said upper knife. The carriers 26 for the two movable knives 23 are movable in suitable guideways in uprights 27 forming part of the framework of the apparatus. The sets of cutters 20, 21 may be designated the front and rear end sets of end edge cutters, and the eccentric 24lof the front end set is mounted on a shaft 30, provided with a pulley 31, see Fig. 1, which is connected by a belt with a pulley 33 on the shaft 3d on which is mounted the eccentric 24L of the rear end set, so that both eccentrics and the knives connected with them may be operated simultaneously. The shaft 34 may be driven in any suitable manner and is shown as driven from a shaft 36 by a pinion 37 on the latter meshing with a gear 38 on the shaft 3l.

The movable members 23 of the sets 20,

21 of end edge cutters are designed to be operated intermittently, and this may be accomplished as herein shown, by rotating the shaft 36 intermittently, for which purpose the latter is provided with a clutch mechanism of known construction and comprising a dog 4L0, see Figs. 2, 2* and 2*, carried by a member ll fast on the shaft 36, and adapted to be moved into engagement with a member 42 which is loosely mounted on the shaft 36 to normally run freely thereon, and which is represented as provided with a series of notches or teeth 43, with which the dog 40 engages, and with a flanged periphery for engagement with. a driving belt 44:. The dog 1-0 is designed to be thrown into engagement with a notch or tooth 43 by a suitable spring l5 and to be disengaged therefrom by a crank 4:6 on a rock shaft d7 suitablymounted in the framework of the apparatus, and having a crank or arm d8 extended up to near the path of movement of the metal sheet and carrying a rod l9 having a head 50, which is located in the path of movement of the metal sheet so as to be struck thereby. The rod 49 is encircled by a spring 51 which permits it to yield slightly to allow the metal sheet to clear the pair of feed rolls 190, 191 before the end edge cutters are operated.

The spring actuated rod l9 constitutes one form of stop mechanism to arrest the forward movement of the metal sheet and also cooperates with the crank d8, rock shaft 47 and crank l6 to act as a controlling device for the clutch, whereby the dog 40 is permitted to couple the members 4-1, l2 of the clutch, and thus cause the shaft 36 to be driven by the belt 44, so as to operate the eccentrics and effect movement of the movable knives of the end edge cutters, and thereby simultaneously cut the front and rear ends of the metal sheet transversely and produce parallel end edges which are accurately spaced'apart and are at right angles to the side edges when it is desired to resquare the metal sheet. The dog 40 is normally" held out of engagement with the- LCKTAEE notched. member 42 by a spring 55 acting on the crank L6.

During the transver e cutting operation, the metal sheet is stationary and is supported upon a suitable bed or table between the transverse or end edge forming cutters. In the present instance, the table or bed is shown as a plurality of rods 60, see Fig. 3, extended transversely of the apparatus and loosely mounted at one end on a rod 61, and said rods are normally supported in a horizontal position by a plurality of cranks or arms 62, see Fig. 6.. one for each rod, which are fast on a ZGC'l shaft 63, supported by the framework of the apparatus and operatively connected with a treadle 6d located at or near the front of the apparatus, so that a single operator can feed the metal sheet-s into the apparatus and effect the removal of the finished metal sheet by depressing the foot treadle 6% so as to rock the shaft 63, lower'the cranks or arms 62 and allow the table 66 to tilt cownwardly and thereby automatically discharge the finished metal sheet tierefrom, after which the table is elevated into its horizontal position by a counterweight 65 or otherwise, when the operator releases the treadle 64;.

The table 60 is provided with a guide 66 for the metal sheet, which receives the latter from the feed rolls 190, 191, which may be rotated in any suitable manner and cooperate with. the delivery rolls 1'4", 18 to firmly grip the metal sheet and maintain it in its true course, assisted by the guide 66, so that the metal sheet will be properly presented to the transverse cutters and thus insure accurate cutting of we end edges of the metal sheet, and in the case of a resquared metal sheet insure the end edges being at right angles to the parallel side edges. T he movable members 23 of the transverse cutters may be provided. with fingers or devices 70 for knocking down the surplus strip cut off from the ends of the metal sheet.

From the above description, it will be seen, that the metal. sheet produced as above described is a V in that it provided with accurate dimensions and capable of being used without the necessity of further trimming off of its ec ges.

It will also be observed that this finished product can be produced in a minimum time, with a minimum labor, as only one man is required to perform the work, and at minimum cost, in labor and floor room.

T he method and apparatus above described are especially adapted among other uses, to be employed in rolling mills for resquaring substantially large metal sheets, varying in length from 6 to 10 feet and in width from 2 to 3 feet.

These substantially large sheets are now roughly resquared in rolling mills bypree y said )7 0i pairs 0 0e ement of the 55 vi-t1 e0 eble to suppert it is bei led path 0' mg an air" treating metal muitaneousl y' out 65 s of udinal I UK,

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